The sentinels just don't look like they were made/designed in the 70s.

Like I said before, the Sentinels have a 90s/early 2000s feel to it. Like they reminded me of the designs of walkman/discman/MAC computers back in the 90s/early 2000s.

This is kind of the point. They're not supposed to look like something that they would have had in the 70's. They are supposed to look advanced for the 70's. Decades ahead of where you would expect technology to be.

Wow, how many times does it have to be repeated? They're saying the design does not look like something a person in the 70's would have considered futuristic.

It was designed by someone with a post 2000's mindset, and it shows.

Funny, I remember giant purple robots appearing in the pages of X-Men in the 1960s...and that's exactly what these are. The 1970s Sentinels are slow and clunky looking. That's how robots were previously thought of. That's how the Sentinels were designed in the comics.

The future Sentinels are slender, agile, and have an organic texture. That is a modern design. Even Nimrod who was designed in the 80s and was supposed to be futuristic was just a hovering trash can.

Funny, I remember giant purple robots appearing in the pages of X-Men in the 1960s...and that's exactly what these are. The 1970s Sentinels are slow and clunky looking. That's how robots were previously thought of. That's how the Sentinels were designed in the comics.

The future Sentinels are slender, agile, and have an organic texture. That is a modern design. Even Nimrod who was designed in the 80s and was supposed to be futuristic was just a hovering trash can.